John d



(ModeL) J. D. RICHARDSON, Jr.

Telephone Switch Signal. No. 240.184. Patented April 12,188].

' INVENTOR:

v ATTORNEYS.

ILFETERS. PHOTO-LITHOGRAPNER. WASHIilGTON, D C.

' UNITED STATES PATENT OFFICE.

JOHN D. RICHARDSON, JR., OF NEWPORT, RHODE ISLAND.

TELEPHONE SWITCH-SIGNAL.

SPECIFICATION forming part of Letters Patent No. 240,184, dated -April 12, 1881.

Application filed January 8, 1881. (Model) To all whom it may concern:

Be it known that I, JOHN D. RICHARDSON, J r., of Newport, in the county of Newport and State of Rhode Island, have invented a new and Improved Telephone Switch-Signal, of which the following is a full, clear, and exact description.

In telephone-exchange systems, where it is necessary to have six or eight stations connected with one line-wire, it is desirable that the telephone-switches be placed correctly after using for speaking purposes, for it left in a wrong position there is much trouble and delay in finding and remedying the fault. To overcome this I have invented a telephone switch-signal that reminds the person using the telephone, either by visible signals or by vibrations of the call-bell, to place his switch in the right'position, or that his switch is wrongly placed, thus preventing the switch from being left in awron g position, and saving time and trouble in finding and locating the misplaced switch.

The invention consists of a signal-plate indicator or disk moved by a lever connected with the switch-lever hook of a telephoneswitch, and in the drawings is shown connected with a Bell-telephone switch-bell.

Figure 1 is a front elevation of the switchsignal attached to a telephone switch-bell. Fig. 2 is a plan of the same. Fig. 3 is an end elevation of the telephone switch-signal. Fig. 4 is a front elevation, showing the electrical connections of the device.

Similar letters of reference indicate corresponding parts.

In the drawings, A represents the switchhook on the end of a switch-lever, A, on which the telephone is hung, with the effect of keeping the switch closed, a ground-plate, G, being attached to the back of said lever A, the weight of the telephone keeping it (the lever) in contact with the plates B O.

F G represent the line-wire posts, and G2 the ground-wire post. E are the telephone-posts, H, the armature, and M the magnet, all on the frame M.

other insulating substance, to prevent electric connection between the switch signal-lever N and the switch-lever A, which latter is hitched to the signal-lever N by a wire, I, that allows said lever A a lateral movement.

P represents two platinum springs, that depend from the plate P and hug the lever N when the latter is raised, said plate Pbeing secured on the insulating-plate P.

D is a signal-plate or indicator, on which may be inscribed any sign or warning. Said disk D or indicator is hinged at b on a plate, D, that is fixed on the insulating-plate P and is raised and lowered by the bent rod D, or other suitable device, which connects it with the lever N.

L is a small upright post, in electrical connection with the plate N and having a platinum spring, L, attached thereto at right angles.

R is the receiver, and S is the lightning-arrester.

When this apparatus is placed on a switchbell, the spring L is between the armature H and core of the magnet M, pressing on the armature H, but not touching it when said armature H is off.

The springs P are connected with groundwire post G by wire 0, and the frame M is connected with line-wire F by wire d.

When the switch is in place the switch signal-lever N will not touch the springs P, and the disk D or indicator is brought down flat, not showing any sign.

- When the telephone is switched in, the switch signal-lever N rises with the switchlever A, and is pressed by springs P. As the battery is taken off when the telephones are used, the short circuit will have no effect on the bell-magnet M; but if the switch remain so after the conversation is ended, then when the battery is put on the bell Q will ring violently until the switch is placed right, and then the switch signal-lever N falls from the springs P.

The disk D or indicator lifts every time the switch is moved through the medium of the rod D, and thereby gives notice to the user of a connected telephone to set the switch correctly before leaving. Said disk or indicator D'm ay be used without the short circuit. They may be used separately or together.

When the switch A is down, the electric current passes through the wire F, post F, wire F magnet M, wire M plate 0, switchlever A, plate B, wire B, post G, and out on wire G. When the switch is up the lever N is also up, and the current then passes successivelythrough the wire F, post F, wire F magnet M, wire M plate 0, ground-plate O, telephone R, plate 6, and ground -plate G but when the armature H is drawn up to touch the spring L, the magnet M is out out or short circuited, the current passing from the wire F through post F, wire (1, frame 1 armature H, springs L, post L, plate N lever N, springs P, wire 0, and ground post and wire G As soon as contact between the armature H and spring L is broken, the current passes directly through the magnet M, and the armature H is again attracted. When the lever A is up the connections are made in the usual way for talking with the telephone.

Having thus described my invention, I claim as new and desire to secure by Letters Patent- 1. In atelephoneswitch-signal,theindicator or plate D, provided with a connecting-link, D, in combination with switch-lever A, substantially as described.

2. A telephone switch-signal consisting of lever N, pivoted at a, spring P, plates P and P, plate D, post L, and spring L, as and for the purposes described.

3. A telephone switch-signal constructed substantially as herein shown and described, consisting of pivoted signal-lever N, stud and plate N N springs and plate P P and insulating-plate P post and spring L L and indicator-rod and plate D D D arranged and operated as set forth.

4. The combination,withatelephone-switch, of the signal-lever N, provided with insulator 0, wire I, stud and plate N N, springs and plate P P, insulating-plate P post and spring L L, and indicator-rod and plate D D D as and for the purpose substantially as herein described.

5. In a telephone switch-signal, the combination, with the pivoted signal-lever N, stud and plate N N rod D, and hinged indicator D, of the springs P, substantially as and for the purpose described.

JOHN D. RICHARDSON, JR.

Witnesses JOSEPH BARRETT, JOHN B. TILLEY. 

